I really like that profile, Lin.
Weigh that thing before you remove too much material! I use an old PO scale.
Then, use the metal calculator:
http://www.dwsteel.com/calculator.asp?m1=2&m2=4&s=1 I do that all the time so that when I'm cutting some material from large stock, like DH III's round W2, I'll know how much to cut off for a blade.
If you know you need so much weight of a particular dimension, but don't have that dimension on hand and need to forge it from something else, you can always figure out how much is needed.
Say you want a chunk of steel that is 1 1/2"W X .270"T and 10 inches long, but only have 2" Round stock, then you'll need to cut a piece of the 2" round 1.3 inches long.
Anyway - sorry to go off on something else.
That's just a fantastic Rhea Blade.